diff --git a/docs/specs/mi9.md b/docs/specs/mi9.md
index b73de2d..bf17c8c 100644
--- a/docs/specs/mi9.md
+++ b/docs/specs/mi9.md
@@ -3,7 +3,7 @@
 ### General
 
 * Regional name(s): -
-* Android codename: ?
+* Android codename: cepheus
 * MIUI codename: MI9
 
 ### Hardware
@@ -135,4 +135,4 @@
 * Accelerometer: Yes
 * Barometer: No
 * Electronic compass: Yes
-* Hall: No
\ No newline at end of file
+* Hall: No